move daemonization code to unix/

src/unix/SignalHandlers.cxx

@@ -0,0 +1,82 @@
+/*
+ * Copyright (C) 2003-2014 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "config.h"
+#include "SignalHandlers.hxx"
+#include "event/SignalMonitor.hxx"
+
+#ifndef WIN32
+
+#include "Log.hxx"
+#include "LogInit.hxx"
+#include "event/Loop.hxx"
+#include "system/FatalError.hxx"
+#include "util/Domain.hxx"
+
+#include <signal.h>
+
+static constexpr Domain signal_handlers_domain("signal_handlers");
+
+static void
+HandleShutdownSignal()
+{
+	SignalMonitorGetEventLoop().Break();
+}
+
+static void
+x_sigaction(int signum, const struct sigaction *act)
+{
+	if (sigaction(signum, act, NULL) < 0)
+		FatalSystemError("sigaction() failed");
+}
+
+static void
+handle_reload_event(void)
+{
+	LogDebug(signal_handlers_domain, "got SIGHUP, reopening log files");
+	cycle_log_files();
+}
+
+#endif
+
+void
+SignalHandlersInit(EventLoop &loop)
+{
+	SignalMonitorInit(loop);
+
+#ifndef WIN32
+	struct sigaction sa;
+
+	sa.sa_flags = 0;
+	sigemptyset(&sa.sa_mask);
+	sa.sa_handler = SIG_IGN;
+	x_sigaction(SIGPIPE, &sa);
+
+	SignalMonitorRegister(SIGINT, HandleShutdownSignal);
+	SignalMonitorRegister(SIGTERM, HandleShutdownSignal);
+
+	SignalMonitorRegister(SIGHUP, handle_reload_event);
+#endif
+}
+
+void
+SignalHandlersFinish()
+{
+	SignalMonitorFinish();
+}